Winter fish pond daily management
First, the management of water quality Less rain in winter can easily cause the water level of fish ponds to decrease. Some fish farmers like to put shallow water in fish ponds so that the fish can reach the sun for heating purposes. In fact, shallow winter ponds, rapid changes in water temperature, and large temperature differences can adversely affect fish growth. The main methods of managing water quality are as follows: First, raise the pool water level. Appropriately raising the water level during the winter can increase the volume of the water body and maintain a relatively stable water temperature. Usually, the water level of the fish pond should be kept at about 2 meters. When the water level drops 10 to 15 centimeters, new water must be added in time to stabilize the water level. The second is to regularly regulate water quality. Every 20 to 30 days should be filled with fresh water once, filling 20 to 30 centimeters each time, and properly discharge the old water. The third is to increase calcium and phosphorus. Sprinkle lime solution once a month to increase water body calcium concentration; apply phosphate fertilizer once a month to increase the concentration of phosphorus in the water and enhance the body's ability to resist cold. The fourth is to take oxygenation measures. As the temperature drops, the temperature of the surface water decreases, the density increases and it sinks, and the lack of oxygen in the bottom layer and anaerobic floating on the water will cause serious oxygen deficiency in the upper water. In addition, the short photoperiod in winter, the photosynthesis of the phytoplankton in the water is weakened, and the oxygen production is reduced, which may also result in insufficient oxygen in the aquaculture water. Therefore, it is necessary to take oxygenation measures in due course in the winter and insist on starting oxygenation facilities every noon from 12 noon to 2 p.m. to promote the convection between surface water and bottom water, so that the water in the pond will be even and reasonable, and increase fish appetite and disease resistance. To prevent the occurrence of dead fish in hypoxia. Second, reasonable feeding feed Rational feeding of feed can increase fish disease resistance. In the warm and sunny weather, fish can still feed, so it is necessary to supplement the feed properly so that the energy of the fish's life activities can be replenished and the survival rate can be improved. It is usually fed once every 3 to 5 days. The daily dosage is 0.5% to 1.0% of the fish's body weight. If the water temperature rises above 8°C, the water activity should be increased appropriately and the amount of feeding should be increased appropriately. The specific feeding should be based on the fish's eating situation. Third, the prevention and treatment of diseases In winter and winter, due to the low water temperature, the immunity of the fish is reduced, the disease resistance is weak, and it is vulnerable to infection and infestation by fungi and parasites. Strict disease prevention measures must be taken and water bodies should be disinfected regularly. Due to bruising caused by bumps or frostbite, the fish may be used with water mold or 2 to 3 ppm of methylene blue in the whole pool. Sprinkle with 2 to 3 times. In addition, trichoderma and caterpillar fungus can be used copper sulfate, ferrous sulfate mixture (according to 5:2 preparation) Quanchiposa. Fourth, adhere to the patrol pond Every morning, evening, and evening, the ponds are inspected once. Pay attention to the color of the ponds and fish activity, and make records. When the temperature drops to 3～5°C, the pond water level should be added to the optimal depth, and check whether the inlet and outlet channels are unblocked. If the pool surface is frozen, try to shorten the ice-sealing period. When the temperature rises before the spring starts, the pool water should be drained to raise the temperature of the fish pond as soon as possible, prompting the fish in the pond to eat earlier and increase the growth period. Rechargeable Hearing Aid Rechargeable Hearing Aid Shenzhen Sunshine Technology Co.,Ltd , https://www.szyatwin.com